2009 NISSAN LATIO Service Repair Manual

cabin filter set clock fuel consumption airbag disable fuel additives technical data

Page 2097 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0171 FUEL INJECT
ION SYSTEM FUNCTION
EC-741
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
7. If it is difficult to start engine at step 6,
the fuel injection system has a ma

DTC P0171 FUEL INJECT
ION SYSTEM FUNCTION
EC-741
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
7. If it is difficult to start engine at step 6,
the fuel injection system has a malfunction, too.
8. Crank engine while depressing accelerator pedal. If engine starts, go to EC-743, " Diagnosis Procedure " . If
engine does not start, c heck exhaust and intake air leak visually.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Disconnect mass air flow sensor (1) harness connector.
4. Restart engine and let idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor (1) harness connector.
6. Select Service $03 with GST. Make sure DTC P0102 is detected.
7. Select Service $04 with GST and erase the DTC P0102.
8. Start engine again and let it idle for at least 10 minutes.
9. Select Service $07 with GST. The 1st trip DTC P0171 should be
detected at this stage, if a malfunction exists. If so, go to EC-743, " Diagnosis Procedure " .
NOTE:
If 1st trip DTC is not detected during above proc edure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar condi tions to (1st trip) Freeze Frame Data for 10 min-
utes. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Da ta means the vehicle operation that the following con-
ditions should be satisfied at the same time.
10. If it is difficult to start engine at step 8, the fuel injection system has a malfunction.
11. Crank engine while depressing accelerator pedal. If engine starts, go to EC-743, " Diagnosis Procedure " .
If engine does not start, check exhaust and intake air leak visually.
Engine coolant temperature (T)
condition When the freeze frame data shows lower than 70
°C (158 °F),
T should be lower than 70 °C (158 °F).
When the freeze frame data shows higher than or equal to 70 °C (158 °F),
T should be higher than or equal to 70 °C (158 °F). BBIA0701E
Engine speed Engine speed in the freeze frame data
± 400 rpm
Vehicle speed Vehicle speed in the freeze frame data ± 10 km/h (6 MPH)
Engine coolant temperature (T)
condition When the freeze frame data shows lower than 70
°C (158 °F),
T should be lower than 70 °C (158 °F).
When the freeze frame data shows higher than or equal to 70 °C (158 °F),
T should be higher than or equal to 70 °C (158 °F).

Page 2098 of 4331

NISSAN LATIO 2009 Service Repair Manual B

Page 2099 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0171 FUEL INJECT
ION SYSTEM FUNCTION
EC-743
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
Do not use ECM ground terminals wh
en measuring input/output voltage. Doing so may r

Page 2100 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-744< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0171 FUEL INJECTION SYSTEM FUNCTION
1. Listen for an intake air leak after the mass air flow sensor.
2. Check PCV hose connection.
OK or NG OK >> GO TO 3.

Page 2101 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0171 FUEL INJECT
ION SYSTEM FUNCTION
EC-745
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
1. Install all removed parts.
2. Start engine and warm it up to normal operating tem

Page 2102 of 4331

NISSAN LATIO 2009 Service Repair Manual " Diagnosis Procedure " .
NOTE:
If 1st trip DTC is not detected during above proc edure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Sta

Page 2103 of 4331

NISSAN LATIO 2009 Service Repair Manual DTC P0172 FUEL INJECT
ION SYSTEM FUNCTION
EC-747
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
8. Crank engine while depressing accelerator pedal.
If engine starts, go to EC-749,

DTC P0172 FUEL INJECT
ION SYSTEM FUNCTION
EC-747
< SERVICE INFOMATION >
[MR TYPE 1] C
D E
F
G H
I
J
K L
M A EC
NP
O
8. Crank engine while depressing accelerator pedal.
If engine starts, go to EC-749, " Diagnosis Procedure " . If engine does not start, remove ignition plugs and
check for fouling, etc.
WITH GST
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Disconnect mass air flow sensor (1) harness connector.
4. Restart engine and let idle for at least 5 seconds.
5. Stop engine and reconnect mass air flow sensor harness con- nector.
6. Select Service $03 with GST. Make sure DTC P0102 is detected.
7. Select Service $04 with GST and erase the DTC P0102.
8. Start engine again and let it idle for at least 10 minutes.
9. Select Service $07 with GST. The 1st trip DTC P0172 should be
detected at this stage, if a malfunction exists. If so, go to EC-749, " Diagnosis Procedure " .
NOTE:
If 1st trip DTC is not detected during above proc edure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar condi tions to (1st trip) Freeze Frame Data for 10 min-
utes. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Da ta means the vehicle operation that the following con-
ditions should be satisfied at the same time.
10. If it is difficult to start engine at step 8, the fuel injection system has a malfunction.
11. Crank engine while depressing accelerator pedal. If engine starts, go to EC-749, " Diagnosis Procedure " . If engine does not start, remove ignition plugs and
check for fouling, etc. BBIA0701E
Engine speed Engine speed in the freeze frame data
± 400 rpm
Vehicle speed Vehicle speed in the freeze frame data ± 10 km/h (6 MPH)
Engine coolant temperature (T)
condition When the freeze frame data shows lower than 70
°C (158 °F),
T should be lower than 70 °C (158 °F).
When the freeze frame data shows higher than or equal to 70 °C (158 °F),
T should be higher than or equal to 70 °C (158 °F).

Page 2104 of 4331

NISSAN LATIO 2009 Service Repair Manual EC-748< SERVICE INFOMATION >
[MR TYPE 1]
DTC P0172 FUEL INJECTION SYSTEM FUNCTION
Wiring Diagram INFOID:0000000004537230
Specification data are reference values and are measured between each terminal

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